After years of political and financial maneuvers that tinkered with heights and affordable housing schemes, New York-based Paramount Group got the green light to build one of San Francisco’s most contentious towers Thursday.The 75 Howard residential tower will include 130 high-priced units rising 220 feet on prime real estate next to the Embarcadero, replacing a parking garage that adds “blight to the neighborhood,” according to the project architect at Skidmore, Owings & Merrill.